我有一個數組,看起來像這樣提取值隔開字符串
Array
(
[1] => Array
(
[name] => Zeze
[city] => Denver,
[state] => Colorado,
[country] => United States
[user_id] => 1
[cars] => Array
(
[140] => Array
(
[cars_name] => BMW
)
[162] => Array
(
[cars_name] => Mazda
)
)
)
[8] => Array
(
[name] => Lex
[city] => Schwelm,
[state] => North Rhine-Westphalia,
[country] => Germany
[user_id] => 5
[cars] => Array
(
[140] => Array
(
[cars_name] => Mercedes
)
[162] => Array
(
[cars_name] => Audi
)
)
)
)
我需要從user_id
提取值並把它放在一個逗號分隔字符串。
對於上述陣列,我想獲得:
1,5
我有點困惑如何循環這個數組foreach
,然後我將如何建立一個字符串?或者,還有更好的方法?
該答案爲您提供了函數定義和回調操作。另外它可能更易於閱讀。 – hakre